Dynamo-electric machine.



A. L. HADLEY.

DYNAMO ELECTRIC MACHINE.

APPLIOATIOI FILED HAY 14, 1906.

901,440; Patented 0ct.20,1908.

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firth u)- L. Had/e y BYWfM UNITED STATES PATENT OFFICE. I

ARTHUR L. HADLEY, or FORT WAYNE, rizmasa-assrosoa TO GENERA ELscrraic commas, A eoareames or saw YQRK.

'nrnemo-nmc'rnic To all whomit may concem: Be it knf wn that I, ARTHUR HADLEY, a citizen of the United States, residin at Fort QWayne, county of Allen, State of diana, "s'fhave invented'certain new and useful Im provements in Dynamo-Electric Machines, of which thefollowing is a specification.

'My-present invention relates to dynamoelectric machines, and comprises certain improvements in the construction and arrangement of field ma ets for such machines.

The various eatures of novelty which characterize my invention are pointed out with particularity in the claims annexed to and formingapart of this specification. For a better understand of my "invention, however, and the advantages possessed by it, reference ma be had to the accompan'y' drawin an 'dcscri tive matter in which fi have 1 ustra'ted an described one of the waya'in which my invention ma} be carried out. a

In the drawings Figure 1 is an elevation of a portion of a dynamo electric machine, partly broken awe andin section; Fig. 2 is a plan view of a fi d pole and winding therefor: looking at the armature'end ofthe pole] Fig. 3 is a plan view of a series of punchings of oneformemployed, illustrating the man: ner in which theyare cut from stock; Fig. 4 is a view similar to 3 showin a-different form of unching use and Fi 5 is an elevation o a field pole and win liig with the latter broken away andin' section, illustrata modification. I ferring to the drawings, lrepresents the stationary field member of an internally-revolving armature of a dynamo-electric machine. The field mber comprises a field and internally-projecting 1e pieces 3. The le pieces 3 each compri g a central bun e or unit 4 of lamina. 5 placed between two bundles 6 of laminae 7. I The bundles 6 are similar to eaehother' andtho h somewhat narrower are substantially similar to bundle.4. In the form of my invention shown the bundles 4 and 6 forming each pole fiece are secured together by rivets 8, and

' ave their ends remote from the armature,

. 5Q cast into the field ring-2.

The winding 9 surrounding each pole piece may be of any-suitable form, though it may be" advantageously 'made oblong'as shown. In the construction shown in detail, the

Specification o! Letbarl 'lfatent. Application filed Bay t, me. sum It. siasorj' passes radially fawa for each pole comprises aseries coil 10 gam tes Out. 20,1

' and ashunt coil 11. Each coil ii). is divided into twosections '12 and 13' separated b ventilating space tar-passage 14. Similar each c 0il 111s divided into two-sections 15- and'lfi'separated by a ventilating space 17 The adj acentienwthe ventilating spaces 14 and 17 in each 'ndin are inr ist'er. The coils 10 andll for pole'rnay e asv sembled'on a single'js'pool l8 provided vvitki end members18 and an inter be 18" separatin the 10: 1-1; Ariertures 20 are fo rmed the and 18 which register with the ventilating .spacesj14 and 17, The spoolsrhaybe ractically of an desired shape, but are so armed that vent' atingpassages 2 1 are formed between them, the ends of the bundles 6 and the portionsiofthe handle 4 pro'ec the edges of the corri'asponding-ii The windings are secured in field Is by bridges 22' which may be of suitahlie materiahsuch as wood, -As shown;

s t undl the opposite'end's'of each bridgemember-22 enter notches. 2'5 formed in the armature vend of the punchings' 5 forming the central-pen.- tion'of adjacent fieldpolo's. I V With the described, aiaset in motion by thef-ro'tation oiAhe-armature from the armature through the c h nnne 'erages'.2 1 and '85. through the passageslt 17 in thewindings. This'rmsnres a very efficient ventila'- tion of thd'field'poles and wiiidin By makin the laminae 5' of each'field p wider than t e corresponding laminae" 7 a flux .90'

tribution is'obtained facilitates mutation in a manner welikn'own to skilled in the art. These advantageslare ob tained with a constn ction'which is f'simple' and compact and: may begeconomically s8 et f he ave oun' t att '5ma. advantageously formed b 'cuttingI- fthem" from a strip of the same th'as the'punch ings in the manner shown in Fig. 4." Each punching has its armature end ,ap 'roximately concentric with. the axis of rotat on of the armature and the ends of the punching remote from the armature of the same curvature. As a resul each punching 5.ma be formed by a-sim e die-cutting. or punching operation in which the unchmg is severe V from-the stock strip an the'notches 23, 24,' 25, 26 and 27',- if desired, may beformed at thetime. The-notches 24,,arefor the 1 19 merfiate m'em- 65.

g y es 4,. place on the 7}" purpose of preventing injurious cross flux in the pole tips, due to the armature reaction. The notches 2'3, 26 and 27 are formed for the pprpose of facilitating the production of a m and reliable connection of the punchings with the cast ring 2.

The punchings 7 may he formed by the same dies employed in cutting or punchin out the punchings 5. In Fig. 4 the dotte lines 28, representin the'outline of a stri from which the punc ings 7 are formed an the outline of the punchings 5, show the relative position of the two stock stri s with reference to the die-cutting or pundhing apparatus used.

Of course, the notches 23 and 27 formed in the punchings 7 are-not as deep as in thepunchings 5, but this is of no material dis-.

advantage. By forming the punchings in the mannendescribed, an extremely efficient use of stock from which the laminae are cut is obtained. This stock, which may come in sheets of indefinite length and widths, is cut into strips the width of the punchings 7 and 5, and the only material in a long strip' wasted, aside from the materials cut out in forming the notches 23, 24, 25, 26 and 27, consists of an end piece 29 and a corresponding piece at the opposite end of the strip.

t will be understood that the dies employed -for makingv the .punchings Sand 7 ma also be employed for formin -punchings wit out waste from stri s slight ywider 'or narriower than the puncliings 5 and 7, if desire I It will be observed that the notches 26 are not exactly midway between the side edges of the punchings, and that the notches 23 0.114127 at opposite sides. of each unching are not directly opposed to each ot e'r.

In assembling each field pole certain of the unchings are reversed with respect to each other, so that the various notches 26 are not in exact register with each other, and the notches 23 and 27 at each side of the pole piece are also more or less out of register. his improves the connection between the field pole and the field Instead of forming the windings as shown in Fig. 1, I may form them as shown in Fig.-

5 where the upper end of the shunt coil section 15 is space away from the intermediatemember 18" in any suitable manner as by spacing blocks 30: As a result 01' this construction, air entering the armature end of the passage 17 may pass out partly through the passa e 14 and partly through the passages 31 between the outer end of the coil section 15, the-member 18" and the blocks 30. This arran ement of the ventilating means has been ound to be quite advantageous under some circumstances.

While the particular forms of my invention disclosed have been found to give excellent results in praetiee, it will be understood that my invention is not limited in all of its I by Letters Patent of the United States,.is:-

1. In a commutating dynamo electric machine, a field pole comprising a central section of laminae interposed between two side sections of laminae, the laminae forming the central section being wider than the laminae in the side sections.

2. In a commutating dynamo electric machine, field poles each composed of a central bundle of laminae placed between two other bundles of laminae, the laminae forming the central bundle being wider than the other laminae and arranged so that'each side of the central bundle projects by the corresponding edges of the ot er bundles. Y

3. Ina dynamo electric machine, a' windin and a field pole surrounded thereby, said fie d pole com )rising a central sectlon of laminae placed between two side sections of laminae, the laniinze forming the central section being wider than the other laminae whereby ventilating spaces are'formed between the central and side sections and the windings. k

4. In a dynamo electric machi a winding', a field pole surrounded by sailiwinding, said field, pole consisting of a central section of laminae interposed between two side sections, the laminae forming the central section being wider than those of the other sections whereby ventilating spaces are formed bewider than the other laminae and arranged so that each side edge of the central bundle pro- 'ects by the COIIBSPOlhliIlg edges of the other bundles, windings on each of said fieldpoles, and a winding support extending between each adjacent pair of field poles, each winding support engaging the central bundle of the corresponding field pole.

6. In a dynamo electric machine, a laminated field pole composed of laminae, some of which are wider than others, the wider laminae having notches formed in "them, and

coil retaining devices entering said notches.

7. In a dynamo electric machine, a field pole composed of laminae, some of which are wider than others, but all of which are of the same length, each lamina havii its armature end substantially concentric with the axis of the machine, and its opposite end of 901,440 a c the same curvature as the armature end, said being e ual to the corresponding distance in laminae having notches formed in their side eve 0t er lamina, the wider laminae having the distance between the -ad'acent notc es formed in their opposite side edges 20 si es of the notches in the 'op its edges of at their armature ends to receive coil-retaineach lamina bein equal to t 0 correspond ing devices, the distance between the lasting distances ofr t e other laminae whereby l mentioned notches in opposite edges of each the narrow and wide laminae may be formed wide lamina being not see than the'width of bysthia saniiielgies. each nagroviver lamina, whereby the rbiarrofiv 25 n a e 111 et structurmcomprisin .an wi 'e amines may y t e 1o laminated field p 5; cast into a'cast metfi same dies.

yoke, said field poles each composed of lami- In witness whereof, I have hereunto set nu, some of which are wider than others, and all of which are of the same is h, each of said laminae having notchesformed in the ARTHUR HADLE 5 side of the portion embedded in said With:

yoke, t e distance between adjacent sides of JAMES .J. Woon, the notches in opposite edges of each lamina T. W. BEHAN.

my hand this tenth day of May, 1906. 

